Adding upstream version 1:4.15.2.upstream/1%4.15.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 0 insertions, 273 deletions

diff --git a/libmisc/user_busy.c b/libmisc/user_busy.c
deleted file mode 100644
index c03feb2..0000000
--- a/libmisc/user_busy.c
+++ /dev/null
@@ -1,273 +0,0 @@
-/*
- * SPDX-FileCopyrightText: 1991 - 1994, Julianne Frances Haugh
- * SPDX-FileCopyrightText: 1996 - 2000, Marek Michałkiewicz
- * SPDX-FileCopyrightText: 2000 - 2006, Tomasz Kłoczko
- * SPDX-FileCopyrightText: 2007 - 2009, Nicolas François
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-#include <config.h>
-
-#ident "$Id: $"
-
-#include <assert.h>
-#include <stdio.h>
-#include <sys/types.h>
-#include <dirent.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include "defines.h"
-#include "prototypes.h"
-#ifdef ENABLE_SUBIDS
-#include "subordinateio.h"
-#endif				/* ENABLE_SUBIDS */
-#include "shadowlog.h"
-
-#ifdef __linux__
-static int check_status (const char *name, const char *sname, uid_t uid);
-static int user_busy_processes (const char *name, uid_t uid);
-#else				/* !__linux__ */
-static int user_busy_utmp (const char *name);
-#endif				/* !__linux__ */
-
-/*
- * user_busy - check if an user if currently running processes
- */
-int user_busy (const char *name, uid_t uid)
-{
-	/* There are no standard ways to get the list of processes.
-	 * An option could be to run an external tool (ps).
-	 */
-#ifdef __linux__
-	/* On Linux, directly parse /proc */
-	return user_busy_processes (name, uid);
-#else				/* !__linux__ */
-	/* If we cannot rely on /proc, check is there is a record in utmp
-	 * indicating that the user is still logged in */
-	return user_busy_utmp (name);
-#endif				/* !__linux__ */
-}
-
-#ifndef __linux__
-static int user_busy_utmp (const char *name)
-{
-#ifdef USE_UTMPX
-	struct utmpx *utent;
-
-	setutxent ();
-	while ((utent = getutxent ()) != NULL)
-#else				/* !USE_UTMPX */
-	struct utmp *utent;
-
-	setutent ();
-	while ((utent = getutent ()) != NULL)
-#endif				/* !USE_UTMPX */
-	{
-		if (utent->ut_type != USER_PROCESS) {
-			continue;
-		}
-		if (strncmp (utent->ut_user, name, sizeof utent->ut_user) != 0) {
-			continue;
-		}
-		if (kill (utent->ut_pid, 0) != 0) {
-			continue;
-		}
-
-		fprintf (log_get_logfd(),
-		         _("%s: user %s is currently logged in\n"),
-		         log_get_progname(), name);
-		return 1;
-	}
-
-	return 0;
-}
-#endif				/* !__linux__ */
-
-#ifdef __linux__
-#ifdef ENABLE_SUBIDS
-#define in_parentuid_range(uid) ((uid) >= parentuid && (uid) < parentuid + range)
-static int different_namespace (const char *sname)
-{
-	/* 41: /proc/xxxxxxxxxx/task/xxxxxxxxxx/ns/user + \0 */
-	char path[41];
-	char buf[512], buf2[512];
-	ssize_t llen1, llen2;
-
-	snprintf (path, 41, "/proc/%s/ns/user", sname);
-
-	if ((llen1 = readlink (path, buf, sizeof(buf))) == -1)
-		return 0;
-
-	if ((llen2 = readlink ("/proc/self/ns/user", buf2, sizeof(buf2))) == -1)
-		return 0;
-
-	if (llen1 == llen2 && memcmp (buf, buf2, llen1) == 0)
-		return 0; /* same namespace */
-
-	return 1;
-}
-#endif                          /* ENABLE_SUBIDS */
-
-
-static int check_status (const char *name, const char *sname, uid_t uid)
-{
-	/* 40: /proc/xxxxxxxxxx/task/xxxxxxxxxx/status + \0 */
-	char status[40];
-	char line[1024];
-	FILE *sfile;
-
-	snprintf (status, 40, "/proc/%s/status", sname);
-
-	sfile = fopen (status, "r");
-	if (NULL == sfile) {
-		return 0;
-	}
-	while (fgets (line, sizeof (line), sfile) == line) {
-		if (strncmp (line, "Uid:\t", 5) == 0) {
-			unsigned long ruid, euid, suid;
-
-			assert (uid == (unsigned long) uid);
-			(void) fclose (sfile);
-			if (sscanf (line,
-			            "Uid:\t%lu\t%lu\t%lu\n",
-			            &ruid, &euid, &suid) == 3) {
-				if (   (ruid == (unsigned long) uid)
-				    || (euid == (unsigned long) uid)
-				    || (suid == (unsigned long) uid) ) {
-					return 1;
-				}
-#ifdef ENABLE_SUBIDS
-				if (    different_namespace (sname)
-				     && (   have_sub_uids(name, ruid, 1)
-				         || have_sub_uids(name, euid, 1)
-				         || have_sub_uids(name, suid, 1))
-				   ) {
-					return 1;
-				}
-#endif				/* ENABLE_SUBIDS */
-			} else {
-				/* Ignore errors. This is just a best effort. */
-			}
-			return 0;
-		}
-	}
-	(void) fclose (sfile);
-	return 0;
-}
-
-static int user_busy_processes (const char *name, uid_t uid)
-{
-	DIR *proc;
-	struct dirent *ent;
-	char *tmp_d_name;
-	pid_t pid;
-	DIR *task_dir;
-	/* 22: /proc/xxxxxxxxxx/task + \0 */
-	char task_path[22];
-	char root_path[22];
-	struct stat sbroot;
-	struct stat sbroot_process;
-
-#ifdef ENABLE_SUBIDS
-	sub_uid_open (O_RDONLY);
-#endif				/* ENABLE_SUBIDS */
-
-	proc = opendir ("/proc");
-	if (proc == NULL) {
-		perror ("opendir /proc");
-#ifdef ENABLE_SUBIDS
-		sub_uid_close();
-#endif
-		return 0;
-	}
-	if (stat ("/", &sbroot) != 0) {
-		perror ("stat (\"/\")");
-		(void) closedir (proc);
-#ifdef ENABLE_SUBIDS
-		sub_uid_close();
-#endif
-		return 0;
-	}
-
-	while ((ent = readdir (proc)) != NULL) {
-		tmp_d_name = ent->d_name;
-		/*
-		 * Ingo Molnar's patch introducing NPTL for 2.4 hides
-		 * threads in the /proc directory by prepending a period.
-		 * This patch is applied by default in some RedHat
-		 * kernels.
-		 */
-		if (   (strcmp (tmp_d_name, ".") == 0)
-		    || (strcmp (tmp_d_name, "..") == 0)) {
-			continue;
-		}
-		if (*tmp_d_name == '.') {
-			tmp_d_name++;
-		}
-
-		/* Check if this is a valid PID */
-		if (get_pid (tmp_d_name, &pid) == 0) {
-			continue;
-		}
-
-		/* Check if the process is in our chroot */
-		snprintf (root_path, 22, "/proc/%lu/root", (unsigned long) pid);
-		root_path[21] = '\0';
-		if (stat (root_path, &sbroot_process) != 0) {
-			continue;
-		}
-		if (   (sbroot.st_dev != sbroot_process.st_dev)
-		    || (sbroot.st_ino != sbroot_process.st_ino)) {
-			continue;
-		}
-
-		if (check_status (name, tmp_d_name, uid) != 0) {
-			(void) closedir (proc);
-#ifdef ENABLE_SUBIDS
-			sub_uid_close();
-#endif
-			fprintf (log_get_logfd(),
-			         _("%s: user %s is currently used by process %d\n"),
-			         log_get_progname(), name, pid);
-			return 1;
-		}
-
-		snprintf (task_path, 22, "/proc/%lu/task", (unsigned long) pid);
-		task_path[21] = '\0';
-		task_dir = opendir (task_path);
-		if (task_dir != NULL) {
-			while ((ent = readdir (task_dir)) != NULL) {
-				pid_t tid;
-				if (get_pid (ent->d_name, &tid) == 0) {
-					continue;
-				}
-				if (tid == pid) {
-					continue;
-				}
-				if (check_status (name, task_path+6, uid) != 0) {
-					(void) closedir (proc);
-					(void) closedir (task_dir);
-#ifdef ENABLE_SUBIDS
-					sub_uid_close();
-#endif
-					fprintf (log_get_logfd(),
-					         _("%s: user %s is currently used by process %d\n"),
-					         log_get_progname(), name, pid);
-					return 1;
-				}
-			}
-			(void) closedir (task_dir);
-		} else {
-			/* Ignore errors. This is just a best effort */
-		}
-	}
-
-	(void) closedir (proc);
-#ifdef ENABLE_SUBIDS
-	sub_uid_close();
-#endif				/* ENABLE_SUBIDS */
-	return 0;
-}
-#endif				/* __linux__ */
-